JPH0390572U - - Google Patents
Info
- Publication number
- JPH0390572U JPH0390572U JP15226389U JP15226389U JPH0390572U JP H0390572 U JPH0390572 U JP H0390572U JP 15226389 U JP15226389 U JP 15226389U JP 15226389 U JP15226389 U JP 15226389U JP H0390572 U JPH0390572 U JP H0390572U
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- control circuit
- iris control
- circuit
- pass filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
- Picture Signal Circuits (AREA)
Description
図は本考案の一実施例を示し、第１図はビデオ
カメラのアイリス制御系を示す回路ブロツク図、
第２図はアイリス制御回路の回路図、第３図はア
イリスの作動制御線を示すグラフである。
１……固体撮像素子、６……制御部、７……ア
イリス制御回路、８……ローパスフイルタ、９…
…増幅回路、１０，１１……比較器。
The figure shows one embodiment of the present invention, and FIG. 1 is a circuit block diagram showing an iris control system of a video camera.
FIG. 2 is a circuit diagram of the iris control circuit, and FIG. 3 is a graph showing the iris operation control line. DESCRIPTION OF SYMBOLS 1...Solid-state image sensor, 6...Control unit, 7...Iris control circuit, 8...Low pass filter, 9...
...Amplification circuit, 10, 11...Comparator.
Claims (1)
電圧との比較出力により感度を制御するアイリス
制御回路に於て、前記比較器の前段にローパスフ
イルタ並びに増幅回路を直流結合したことを特徴
とするビデオカメラのアイリス制御回路。 In the iris control circuit that inputs a luminance signal in a video signal to a comparator and controls the sensitivity by comparing the output with a reference voltage, a low-pass filter and an amplifier circuit are DC-coupled in front of the comparator. video camera iris control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15226389U JPH0390572U (en) | 1989-12-29 | 1989-12-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15226389U JPH0390572U (en) | 1989-12-29 | 1989-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0390572U true JPH0390572U (en) | 1991-09-13 |
Family
ID=31698534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15226389U Pending JPH0390572U (en) | 1989-12-29 | 1989-12-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0390572U (en) |
-
1989
- 1989-12-29 JP JP15226389U patent/JPH0390572U/ja active Pending